Capture One Pro 7 Mac Torrent MAXSPEED 1
Anfos Sin
I am looking to build an python application that helps us to verify the UI rendering on the automotive devices, right now I am using a Logitech c920 webcam for recording the device UI at 640 x 480 resolution in 30 fps (the max I could get with opencv).
but, we feel that we are missing out some transitions when we capture at 30 fps, so we are looking to get some high speed camera for capturing the automotive devices. Before getting on I just wanted to know what's the max FPS that's supported by OpenCV. Right now with the logitech webcam it captures at around 29-31 fps.
Actually it al depends on what you are going to do after the capture of each frame. If it is simple placing a frame into a mat element frame by frame, I do not think openCV will ever limit your camera. We have a camera that can capture 150 fps and it does the trick perfectly. HOWEVER, once you start with processing in between, the rate drops which is actually quite normal. It is already hard to get real time performance in computer vision, so getting 30 fps with processing would be considered perfect! Actually, also render your project always in release mode instead of debug, you will be amazed on the increase in speed without all the debug information and functions.
Thanks a lot for the response. With respect to the above scenario we are not doing any processing we are just placing the frames into a dict in python for post processing. During this time we are simply reading frame by frame and putting into the dict.
As you mentioned getting 30 fps is really a great thing, however the automotive UI that we capture is going rendering the screen way more than 30 fps. So, that's the one reason why we are looking for the a high fps camera. We are getting the 30 fps only after putting into the release mode.
Well the problem is I cannot state details of the camera (asked collegue) because it is a specifically designed application which he cannot publish details of. I was just mentioning that it should be possible. However he does have a reduced frame size of 300x25 pixels so that might be the reason why it works that fast.
When you are using a wifi adapter in monitor mode, you are not associated to an access point. It will simply listen on the configured channel(s) and capture any traffic it understands whether that is 802.11b, 802.11g, or 802.11n.
If you are associated to an access point, then you are running in promiscuous mode, and then you are generally only going to capture traffic to/from your station plus any broadcast/multicast/management frames.
Now the flip side is that you need to be fairly close to the source of any traffic running at 300Mbps to be able to capture it. The further you get away from the source, the slower the data rate of any usable data you will capture.
This is one of the "tricks" in analyzing any wireless data and when using wireless tools. You need to understand that the data is presented as it is seen from the current location at the current time. I have used tools that indicate there were hundreds of 802.11b clients around me, but that is because the software tool was only capturing traffic from those clients when they were transmitting at 1/2Mbps and not at higher speeds due to distance/obstructions/interference/noise.
Wireshark (and tshark) will run out of memory at some point because of all the conversation tracking they do. The faster it comes in, the faster it will happen. If you want to capture in such situations for post-analysis then use dumpcap.
No, Wireshark can't handle 1GBps unless you capture it with specialized hardware, e.g. Napatech or Fiberblaze cards (at least Napatech does not sell to retail though). Normal NICs will fail to capture consistently at about 200-300 MBit at the most.
And forget scrolling - it's not going to work well at anything above a couple of MBit because it is not going to show much except for a slide show (if it moves at all). It also leads to dropped frames because it puts additional stress on the capture machine.
My 1st Rover was a 4WD basher style truck and it was way too fast even after gearing it down. I sold it and built the next one from a Rock Crawler vehicle and it performs great. You definitely need slow controlled speed for some maneuvers unless you are in a wide open area with no obstacles. Positional accuracy of the standard GPS is not that great when talking about a ground vehicle compared to flying craft plus the reception is worse on the ground.
I have been able to reduce the throttle max speed using transmitter settings. Also in acro or steering mode you drive the vehicle in manual mode to capture cruise throttle and speed. In manual the vehicle drives at the lower throttle limits so it would seem that when I capture the cruise and throttle speed in manual mode actually driving the vehicle it should capture the lower speed that was captured when driving in manual mode at the lower throttle limit. Am I missing something here? If its using the cruise and throttle speed in manual mode it should capture the lower speed that I choose to drive the vehicle at it seems.
When I set the throttle max to 100% on the transmitter and I drive in manual even at the lower throttle ranges it drives too fast. That is why I set the throttle max speed to a lower setting using the transmitter. It drives much slower in the manual mode as a result. Because I am using manual mode to drive in acro and steering modes when I capture the cruise throttle and speed by activating the transmitter switch to capture these parameters it should capture the lower throttle speed and enter these in cruise throttle and cruise speed in mission planner. Does this make more sense? Also when you switch from manual to acro mode is the vehicle supposed to start moving immediately? I suppose this could be normal but was wondering if this is normal behavior when swithing from manual to acro or steering modes?
I am using a few Picos (connected together via I2C -- but I will switch soon to SPI) as a single USB peripheral connected to a computer and they are working ok. The computer obviously sees only one of the Picos, the one which coordinates with the others on what they need to do.
In one operating mode (just for debugging/calibrating), I would like to capture all the data from the Pico's ADC running at full throttle, which is 500kSample/s at 12bit. With some overhead I have in the protocol, it turns out I'd need several MB/s (note the capital B for bytes, not bits). Unfortunately, the Pico supports at most 12 Mb/s (lowercase b for bits), which is about an order of magnitude less than I need. For everything else I need to do, this bandwidth is adequate, it's just in this debugging/calibrating mode that I have this problem, so I'm asking for advice.
With -webserver I have been able to achieve around 100 KiB/s directly to the host computer, which is insufficient for my needs, but being more convenient it might be good enough for some of you out there.
Getting RP2040 synchronized with the SPI master clock would not be simple. The SPI slave peripheral is able to only go at about 10Mbps out-of-box. You would probably have to use PIO and maybe overclock the RP2040 to get reliable transfers at the full speed.
There is an experimental RMII driver for use with LAN8720 or an established ready-to-use SPI/IP bridge called W5500 that would both enable RP2040 to work as an IPv4 device. You could then send your data using TCP or UDP (probably) at 100Mbps.
In this white-paper, we explore the effects of scene- and camera-motion on the performance of Intel RealSense depth cameras D400 series, and we specifically focus on introducing a new 300 fps high-speed capture mode for the D435 model. We show how this mode can be used to capture fast motion, but also how it can be used to enhance depth performance. To fully appreciate the need for high-speed capture, we also take the time in this paper to explore various motion artifacts and performance limitations of the current modes of operation of both the D415 and D435 models, and the considerations that need to be taken into account when capturing very high-speed motion. The D415 and D435 cameras are shown to behave differently, and artefacts are seen to depend on both distance to objects, lighting conditions, projector illumination, and whether the fast motion comes from the camera moving or objects moving in the scene.
This trade-off with vertical FOV allows us to explore three primary benefits of high-frame-rate capture. First, a higher frame rate obviously allows us to capture faster motion. This will enable usages such as the ability to capture optically both the speed and complete 3D trajectory of a ball flying at high speeds, like a baseball fast pitch. Second, we will show that under bright lighting conditions or high projector power, we can use this high frame-rate mode to reduce the depth measurement noise by capturing at high frame rates and applying multi-frame averaging to enhance the depth measurement while still achieving normal effective frame rates of, say, 30fps. The basic reasoning is that if the depth noise is stochastic from frame-to-frame, then we should in principle see a noise reduction of sqrt (300/30), or 3.16x. Finally, since the Intel on-chip Self-Calibration feature (covered in another white paper) scales in speed directly with the frame rate, introducing a 256x144 300fps mode, means that it can be sped up 3.3x compared to 90fps mode.
In the following we start by explaining how to enable and use high-speed capture mode.
The high-speed depth capture will be released in firmware version 5.12.4.0. It will be available for the download from the Firmware Releases section [1]. To install firmware, Device Firmware Update (DFU) tool is available, or it can be installed directly with the Intel RealSense Viewer. After the firmware installation, launch the Intel RealSense Viewer application bundled in Intel RealSense SDK to check if it can be set into high-speed depth capture mode 848x100 at 300fps (for D435 cameras). Also note that for best high-speed operation, it is recommended to not have any other devices connected to the USB port, and to limit the use of simultaneous applications that place a high load on the host CPU.
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